linking application with a library

David Korn
Fri Oct 12 02:38:00 GMT 2001

>-----Original Message-----
>From: Mohammad Saleem []
>Sent: 18 November 2001 10:36

>I have a lib mylib.a (20 kb) which I want to link with my application.
>My application gets 20 kb bigger as soon as I link it with mylib.a 
>without any function being called from mylib.a.
>It seems to me that I have built mylib.a so that the whole lib 
>is linked 
>during linking process even if no one method is being called.
>Now my question is which flag should I use to build mylib.a so 
>that only 
>those functions are linked which are being called.
>If no function is called then linking mylib.a shouldn't affect 
>the size 
>of my application.

  Alas, the linker is fairly dumb, and can only include or exclude parts
of a lib file on the basis of the section name (.text, .data or .bss).

  Fortunately the compiler is fairly smart, and has an option
-ffunction-sections that puts every function in a different section.  This
should supposedly do the job you wish.

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